Just as per the title really. Had a short cycle before (varied from 21-25 days ish so not that short then some irregular ones at one point at which point I had hormone tests which came back normal ) but since having periods back in May last year they are really short and I started tracking them . They are now exactly 17 days from start to start. Not sure if this is a health issue ? It’s annoying but I don’t want to be on the pill really as it causes me it’s own issues.